JPH0891457A - Aerosol container - Google Patents

Abstract

PURPOSE: To obtain an aerosol container which can continuously change spray patterns without changing the spray amount. CONSTITUTION: An aerosol container consists of an aerosol container main body 1 and a spray button attached on a stem 2 of the main body 1. The spray button has a stationary member 20 and a rotary member 30. The rotary member 30 has a spray nozzle 43, a stopper end 42 with influent grooves 44 that extend in the radial direction and communicate with the spray nozzle 43 and a bar type stopper member 50 that is free to come in contact with and away from the stopper end 42. Both liquefied gas and compressed gas as spray agent are filled in the aerosol container main body 1 together with aerosol raw liquid.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an aerosol container,
In particular, it relates to an aerosol container capable of continuously changing an aerosol injection pattern.

[0002]

2. Description of the Related Art There has conventionally been a demand for arbitrarily changing an injection pattern and an ejection amount according to the use condition of one aerosol product, and some proposals have already been made. For example, the valve housing has an inner-outer double-tube structure that is slidable with respect to each other, and the cross-sectional area of the orifice formed in the wall of each cylinder is changed to change the flow rate passing therethrough, As a result, the injection pattern from the injection nozzle is changed (see Japanese Patent Laid-Open No. 50-121815). The stem is divided into a lower stem and an upper stem, and the upper stem screwed into the lower stem is screwed back and forth. By changing the cross-sectional area of the orifice formed in the stem by adjusting the injection amount, the injection amount can be adjusted freely, and as a result, the injection pattern from the injection nozzle is changed (Japanese Patent Publication No. 52-2).
6924), a stem having a large opening in the center and further having a small lead-out hole communicating with the opening is used, and by adjusting the stroke of the stem, the orifice opening area of the stem is greatly changed, This makes it possible to change the injection amount and consequently change the injection pattern from the injection nozzle (Japanese Patent Publication No. 62-4).
(See Japanese Patent No. 1074) and the like are known.

Those described in each of the above documents are basically
The injection amount is changed by changing the cross-sectional area of the valve stem or the orifice of the valve housing.It works effectively for adjusting the injection amount, but the injection nozzle itself may not have been specially devised. In order to greatly change the injection pattern, it is necessary to change the injection amount considerably. Therefore, even if a desired injection pattern is obtained, there is a disadvantage that the amount of ejected substances at that time is too large or too small.

As an injection button for an aerosol container in which such inconvenience is solved, an improved injection nozzle having a so-called mechanical breakup mechanism is known (see Japanese Utility Model Laid-Open No. 14154/1992). Figure 1
As will be described with reference to FIG. 2 and FIG. 2, reference numeral 1 is an aerosol container body, and the container body 1 has a stem 2 at its upper end. A fixing member 20 having a shaft portion 22 having a communication hole 21 communicating with the opening of the stem 2 is fitted to the upper end of the container body 1. A cam surface 23 is formed at the end of the shaft 22 opposite to the stem 2.

A rotary member 30 is attached to the fixed member 20 so as to be rotatable about its shaft portion 22 as a pivot shaft.
A communication passage 31 having an open end on one side is formed in the rotating member 30 in a direction orthogonal to the shaft portion 22, and a cam surface 23 portion formed at the tip of the shaft portion 22 projects into the communication passage 31. As a result, the communication hole 21 of the shaft portion 22 and the internal space of the communication passage 31 communicate with each other.

An injection port member 40 is attached to the open end of the communication passage 31. The injection port member 40 is formed with an opening 41 having an open end on the communication passage 31 side, and the other end of the opening 41 is a closed end 42. The closed end 42
A small-diameter injection port 43 is formed at the center, and a plurality of concave inflow grooves 44, one end of which is opened to the injection port 43, are formed in the closed end 42 in a state of being curved in the same direction.

A rod-shaped closing member 50 having an outer diameter slightly smaller than the inner diameter of the opening 41 is slidably inserted into the opening 41. The rod-shaped closing member 50 has such a length that one end of the rod-shaped closing member 50 is in contact with the closed end 42 of the injection port member 40, and the other end thereof extends further rearward beyond the position of the shaft portion 22. Further, by the biasing member 60, the closed end 4
It is constantly pressed toward 2.

Further, the rod-shaped closing member 50 has the shaft portion 22.
Has an engaging portion 51 that is in sliding contact with the cam surface 23 formed at the tip of the
Movement of the rod-shaped closing member 50 toward the closed end 42 by the biasing member 60 is restricted. Therefore, when the rotating member 30 is rotated with respect to the container body 1 (fixing member 20), the rod-shaped closing member 50 is moved by the engagement portion 51 formed therein slidingly contacting the cam surface 23, and thus the injection port. Opening 4 of member 40
1 and the inside of the communication passage 31 are moved by a distance corresponding to the distance between the locus of the cam surface 23 and the central axis of the shaft portion 22.

FIG. 1 shows a state in which the rod-shaped closing member 50 is closest to the closed end 42 side of the injection port member 40. In this state, the tip of the rod-shaped closing member 50 is in contact with the end surface of the closed end 42. There is. FIG. 2 shows a state in which the rod-shaped closing member 50 is farthest from the closing end 42 of the injection port member 40,
A distance a is formed between the tip of the rod-shaped closing member 50 and the end surface of the closing end 42. Although not particularly shown, the cam surface 2
By making the locus of 3 a smoothly continuous curved surface, the distance a between the tip of the rod-shaped closing member 50 and the end surface of the closing end 42 can be gradually changed from the state of FIG. 1 to the state of FIG.

The state of FIG. 1 constitutes a so-called mechanical break-up mechanism. The aerosol reaches the internal space of the communication passage 31 from the opening of the stem 2 through the communication hole 21 of the shaft portion 22, Further, it reaches the closed end 42 of the injection port member 40 through the space between the opening 41 of the injection port member 40 and the rod-shaped closing member 50. From there, it passes through a concave inflow groove 44 formed in the closed end 42 and
3, the spray pattern is ejected at a high speed while passing through the injection port 43 and turning to the outside to form an injection pattern having a relatively large diameter.

In the state shown in FIG. 2, the container body 1 (fixing member 2
0), the rotary member 30 is rotated 180 ° from the state of FIG. 1, and in this state, the rod-shaped closing member 50
Is most isolated from the closed end 42 of the injection port member 40. In this state, the mechanical break-up mechanism is no longer configured, and the injection state is the same as the injection from the normal injection port in the aerosol container. An injection pattern with a relatively small radius is formed without significant changes.

[0012]

DISCLOSURE OF THE INVENTION The present inventors have shown in FIG.
When the change of the injection pattern was actually pursued using the aerosol container having the injection nozzle shown in FIG. 2, the cam surface formed from the state of FIG. In the process of reaching the state of FIG. 2, the change of the injection pattern does not proceed smoothly, and when the rod-shaped closing member 50 slightly moves from the state of FIG. 1, the diameter of the injection pattern sharply decreases. The reduced pattern continues until the state is reached, or the diameter of the injection pattern is not greatly expanded even in the state of FIG. 1, and the injection pattern is also changed in the process of changing from that state to the state of FIG. I learned that the diameter of was not changed and the pattern remained unchanged.

That is, since it is not possible to expect a continuous change in the injection pattern in any case, even if the user finely changes the injection pattern according to his / her sensitivity, the desired one cannot be obtained. According to the present invention, an injection button has an injection port, a closed end portion having a radially extending inflow groove that communicates with the injection port, and a closing member that can come into contact with and separate from the closed end portion. Therefore, the purpose is to eliminate the above-mentioned inconvenience of the aerosol container which can selectively switch between the injection state by the so-called mechanical break-up mechanism and the normal injection state. Another object of the present invention is to provide an aerosol container capable of finely and continuously adjusting an injection pattern without significantly changing the injection amount.

[0014]

SUMMARY OF THE INVENTION In order to solve the above problems, the present inventors have made it possible to selectively and selectively switch between an injection state by a mechanical break-up mechanism and a normal injection state. A lot of experiments and researches on the injection characteristics of the are continuously conducted. As a result, in the conventional aerosol container of this type, almost no change in the injection pattern can be obtained when the liquefied gas is used as the propellant, and a large change in the injection pattern is obtained when the compressed gas is used as the propellant. However, since the content itself does not have a diffusing force, it was found that when the gap between the closed end portion and the tip of the closing member is large, it becomes almost rod-shaped.

By continuing the experiment based on the findings, a composition using a compressed gas and a liquefied gas as a propellant to be contained in the aerosol container body without particularly changing the structures and shapes of the injection button and the aerosol container body. It was found that the injection pattern of the undiluted solution was changed largely and continuously by the above, and the present invention was accomplished.

That is, the aerosol container according to the present invention is an aerosol container comprising an aerosol container main body and an injection button attached to the stem portion of the aerosol container, and the aerosol container main body comprises a raw liquid, a liquefied gas as a propellant, and a compressed gas. The injection button, which contains gas, includes an injection port, a closed end portion having a radially extending inflow groove that communicates with the injection port, and a closing member that abuts and is separable from the closed end portion. It is characterized by having.

In the present invention, the shape of the aerosol container body is not particularly limited, and conventionally known ones can be appropriately used.
The injection button also has an injection port, a closed end having a radially extending inflow groove communicating with the injection port, and abutting on the closed end.
With an injection button having a separable closing member, by which a so-called mechanical break-up mechanism can be selectively and continuously switched between an injection state and a normal injection state. It is optional. Furthermore, the liquefied gas and the compressed gas used as the propellant are not particularly limited, and those conventionally used as the propellant of the aerosol container can be appropriately selected.

[0018]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples. In the following Examples and Comparative Examples, the aerosol container can selectively and continuously switch between the injection state by the mechanical break-up mechanism and the normal injection state, which has already been described with reference to FIGS. 1 and 2. An injection test was conducted by using an aerosol container in which the injection button is attached to the stem portion 2 of the aerosol container body 1 and variously changing the stock solution and the propellant.

[Example 1] An aerosol hair tonic was prepared according to the following formulation and specifications. 6.5kgf at Hara solution 95% alcohol 45.0Wt% tocopherol acetate 0.1 wt% l-menthol 0.1 wt% Purified water 54.8Wt% aerosol above stock solution 80.0 wt% dimethyl ether 20.0wt% N ^₂ / cm ₂ Pressurized (25 ° C). Specification Stem 2 opening diameter 0.4φmm Valve housing opening diameter 0.4φmm Injection hole member injection port 43 diameter 0.3φmm

Example 2 A hair spray was prepared according to the following formulation and specifications. Undiluted solution Yukaforma 205 (manufactured by Mitsubishi Yuka) 5.0 wt% Oleyl alcohol 0.2 wt% 99% Alcohol 94.8 wt% Aerosol Above undiluted solution 75.0 wt% LPG3.0 (20 ° C) 25.0 wt% CO ₂ 6 The pressure was increased to 0.0 kgf / cm ² (25 ° C.). Specifications Stem 2 opening diameter 0.3φmm Valve housing opening diameter 1.0φmm Injection hole member injection port 43 diameter 0.4φmm

Example 3 A repellant was prepared according to the following formulation and specifications. Undiluted solution Deet 5.0 wt% Decamethylcyclosiloxane 2.0 wt% 99% Alcohol 93.0 wt% Aerosol Above undiluted solution 85.0 wt% LPG 4.0 (20 ° C) 15.0 wt% N ₂ 6.5 kgf / cm ² Pressurized (25 ° C). Specifications Stem 2 opening diameter 0.5 φmm Valve housing opening diameter 0.3 φmm Injection hole member injection port 43 diameter 0.35 φmm

Example 4 A waterproof spray was prepared according to the following formulation and specifications. Stock solution Fluororesin 0.4 wt% Dimethyl polysiloxane 0.5 wt% Isopropyl alcohol 5.0 wt% Normal heptane 94.1 wt% Aerosol Above stock solution 70.0 wt% Dimethyl ether 30.0 wt% CO ₂ 6.0 kgf / cm ² ( 25 ° C). Specifications Stem 2 opening diameter 0.45φmm Valve housing opening diameter 2.0φmm Injection hole member injection port 43 diameter 0.40φmm

Comparative Example 1 An aerosol hair tonic was prepared with the following formulation and specifications. Pressurizing the raw liquid 95% alcohol 45.0Wt% tocopherol acetate 0.1 wt% l-menthol 0.1 wt% Purified water 54.8Wt% aerosol above stock solution with respect to at ^{_{N 2 6.5kgf / cm 2 (25}} ℃) Pressed Specification Stem 2 opening diameter 0.4φmm Valve housing opening diameter 0.4φmm Injection hole member injection port 43 diameter 0.3φmm

Comparative Example 2 A hair spray was prepared with the following formulation and specifications. Undiluted solution Yuka Former 205 (manufactured by Mitsubishi Yuka) 5.0 wt% Oleyl alcohol 0.2 wt% 99% Alcohol 94.8 wt% Aerosol Above undiluted solution 65.0 wt% LPG5.0 (20 ° C) 35.0 wt% Specifications Stem 2 Opening diameter 0.3φmm Opening diameter of valve housing 1.0φmm Injection port 43 diameter of injection hole member 0.4φmm

In each of the examples and the comparative examples, the gap between the closed end portion 42 of the injection port member 40 of the injection button and the tip of the rod-shaped closing member 50 is changed in three steps, and the sample temperature is set to 25 ° C.
The size of the injection pattern was measured after 1 second from 15 cm behind. At the same time, the continuity of pattern changes and the feeling of switching were also observed to see whether they were good or bad. The results are shown in Table 1.

[0026]

[Table 1]

[Consideration] As can be seen from Table 1, even when the injection button having the same structure is used, Examples 1 to 4 are used.
In other words (that is, when both the compressed gas and the liquefied gas are used as the propellant), the injection port member 40 of the injection button
It can be seen that the diameter of the injection pattern also increases and decreases in proportion to the change in the gap between the closed end portion 42 and the tip of the rod-shaped closing member 50, and the injection pattern continuously changes. In the case of Comparative Example 1 (when only compressed gas is used as the propellant), there is no continuity in the change of the injection pattern, and in Comparative Example 2 (when only liquefied gas is used as the propellant), the injection pattern is Does not follow the change in the gap. From the above results, the effectiveness of the present invention is proved.

[0028]

According to the present invention, it is possible to obtain an aerosol container in which the injection pattern can be continuously changed without changing the injection amount.

[Brief description of drawings]

FIG. 1 is a sectional view of an injection nozzle.

FIG. 2 is a cross-sectional view of the injection nozzle in a state where the injection state is changed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Aerosol container main body, 2 ... Stem, 20 ... Fixing member, 22 ... Shaft part, 23 ... Cam surface, 30 ... Rotating member, 40
... injection port member, 41 ... open hole, 42 ... closed end portion, 43 ... jet port, 44 ... concave inflow groove, 50 ... rod-shaped closing member, 51
... Engagement part

Claims (1)

[Claims] 1. An aerosol container comprising an aerosol container main body and an injection button attached to a stem portion of the aerosol container, wherein the aerosol container main body contains a stock solution, a liquefied gas as a propellant and a compressed gas, The injection button has an injection port, a closed end portion having an inflow groove that communicates with the injection port and extends in the radial direction, and a closing member that can come into contact with and separate from the closed end portion. The characteristic aerosol container.